Copying-lathe.



G. A. ENSIGN L R. E. KLINGER.

COPYING LATHE.

APPLICATION FILED JAN.2.191B.

Patented Oef. 8, 19l8 4 SHEETS-SHEET l l Q m u h. M

G. A. ENSIGN a R. E. KLINGER.

COPYINGLATHE. APPuc'ATloN msn v1AN.2. ma.

1,280,980. Patented oct. 8,4918.

4 SHEETS SHEET 2.

IN VE N T085 ATTORNEYS G. A. ENSIGN 6L R. E. KLINGER.

COPYING LATHE.

APPLICATION FILED 1AN.2. 191s.

Patented Oct. 8

4 S H EETS W/ TNESSES G. A. ENSIGN & R. E. KLINGER.

COPYING LATHE. APPLICAUON FILED IAN.2. |918.

Patented Oat. 8, 1918. 4 SHEETS-SHEET 4- WITNESSES PATENT oFFIcE.

GEORGE A. ENS'IGN AND RUSSELL EQKLINGEjR, or DEFIANGE, OHIO, AssIGNORs To DEEIANCE MAcHiNE WORKS, or DEFIANCE, OHIO, A CORPORATION or OHIO.

OOPYING-LATHE.

To all @from concern:

ing lathe with an aeroplanepropeller in poingend lofthe copying` lathe; l

Fien lt-"lis zin-enlarged cross section of the t Beit known that We, GEORGE A. ENsIcN andRnssELL E. Kranen, bothcitizens `of the United States, and residents f Defiance,

i in the county offDeiance and State of Ohio,

have invented va new and ImprovedCopying-Lathe, of which the `fr )lloiving is a'. full, clear, andexact description.

The invention relates to copying lathes such as .shown and described in the Letters Patent of the United vStates, No'. 723,044, `grgnted kto Charles lSeymour On March 17 The objectof the present invention is to provide a new and improved copying lathe more especially designed for turning aeroplane propellers andsiinilar articles which require duplication-Av of, parts on opposite sides ofacommon center.v

j lith .this and other robjectsiniview, the invention consists of certain novel features ofconstruction, asj hereinafter shown and described, and then specificallyypointed out in theclaims. l

A practical embodiment ofthe invention. is represented l1nthexaccoinpanying drawings forming a part of ,this specification, in

which similar-,characters of reference vindicate correspondingparts inall the views.

Figure 1 is a perspective vien7 of the copysition,toibeturned;v

Fig-2 isanenlarged plan lView Of the same;` l l v Fig-3 `is anenlarged elevation Vof the drivrevoluble work holder;` the ysection being.' A onthelline 4 4; of Flg. 5.; 4e

yFig. 5- is a Sectional plan view kof the same; i

, Fig. 6 is an enlarged side yelevation of the cross-head carrying-the revoluble cutter head and thefrevoluble pattern contact; and

Fig, 7 fs an enlargedcentral sectionv of a portion .ofthe adjusting means for adjusting the .patterncontact .relative to the cuti terheadformakingthe cuts ofmore orless depth.

The copying lathe is mountedion as ut- Specification of Letters Patent.

Appncafioh inea January 2, 191s. serial'no. zo9,93e.

Patented Oct. y8, 1918.

ably constructed bed 10, on Whichis held to slide longitudinally a carriage 11 moved forward a'nd"baclr\vard by the usual feed screw. 12. On the carriage 11 is mounted tol slide transversely a crosshead 13 on which is ]Ournaled .a cutter head 14 Of usual construction and provided with a. pulley 15 connected by a belt with other machinery for continually rotating' the cutter head 14. The cutter headlfl is adapted to act at the time on the portion of the Work to be formed into a blade 'l of lan aeroplane propeller 21 usually provided with a hub 22 from which extends the aforesaid blade 20, and another blade v23, diametrically Opposite the blade 2() and which blade 23 is likewise lturned by the machine from the rough state on reversing the Work in the machine, as hereinafter more fully explained.

On ,the rear of the crosshead 14 is mounted to slide transversely a slide in which is journaled a pattern contact 31, preferably inthe form of a wheel, in contact with a pattern 32, which, as shown, isA in the form o f a blade of a propeller Wheel. The 4pat-v tern 32 is held at one end on a headstock spindle33 and at the other end on a tailstock center31l, and the headstock spindle 33 is journaled in a suitable bearing 35 formed on Ia headstock 36 attached to or tailstoclr center is y.mountedtoturn in a tailstockrod 37 held longitudinally adjustable inthe usualn'ianner in a bearing 38 mounted on a tailstock 39 adj ustably securedr On the bed '10. Springs 410 connect the carriage 11 with the crosshead 13 to hold the pattern contact 31 atiall timesv in contact with the revolving pattern 32. A

The outer end of the blade 20 is held on a revoluble tailstock center mounted to turn in a tailstock rodlil mounted, to slide in the usual manner'in a .bearing 52 arranged on the front of the tailstocl 39. The head'andv tailstockg 36 and 39 areconnected with each other .by a suitable tie-rod 55 to give the desired stability to thetailstock 39.` l Through the bore 24 of the hub 22 of the propeller21 extends a pin 60 terminating at :Oneend in a head 61 abuttingagainst the front face of the hub 22 and held in a longitudinally extending arm 62 of a bracket 63 adjustably secured by a bolt 64 to the righthand end 65 of a tubulary work `holder 66,- the said bolt`64. extendinglthrough a slot 67` formed in the bracket 63 to allow ofreadily adjusting lthe said bracket on theend 65 of the work holder 66. lA- set screw 68 screws in the end 65 ofthe work holder 66 and abuts against the outer end of the .bracket H 63 to permit of accurately adjusting the` bracket 63 at the time the'bolt 64 is loosened. After the desired adjustment 'is made the bolt 64 is screwed up.' `lThe `head' 61 previously mentioned is provided with a flange 69 seated on the front of thebracketmernber 62," as plainly indicated in Figs'. 4Yand 5,l

. and the head 61 is provided withv a polygov bolt 76 is screwed up to fasten the bracket 7 5V o nal recess 70 for the application ofa'suitable tool for turningthe headv6l, as hereinafter more fully described. The rear'end of the pin 60 is provided with a screw thread 71 vwhich screws in a nut 72 fastened by afkey in a longitudinally extending member 74 formed on a Vbrackety 75 adjustably secured on the end 65 by a bolt 76 extending through an elongated`uslot-'77"formed in the bracket` 75. A set screw 78 similar to the set'screw 68 serves to adjust the'bracket 75 in aradial direction after the bolt 76 isloosened, and when the desired adjustnient'is made the inY place. The nutv 72 is provided with a `flange 79 abutting against the rear face of the member74 while the forward end of the nut 72 `abuts against the rear face of the hubj 22k sovthat the latter is clamped between the` head 61 and the nut 72 to securely'hold the hub centrally in position relative'to the work holder 66.k As previously stated, the work holder 66'is made tubular to permit the blade 23 to extend through the tubular work holder lduring the time the other blade 20 isy Yturned by the cutter .head 14 according to' the shape of the pattern 32. Afterthe blader 20 is finished the pin 60 is unscrewed from the nut 72 and removed from thebore 24 of 'e the hub 22 and then-the propeller isreversed and the blade 23 is engaged with the tail#v stock center 50 and the pin 60 is replaced so that the blade 20 extends through the tubu-k lar workholder 66 vwhile the blade 23 is in position to be acted on by the crosshead 14 to turn the blade tothe correct shape, that "is, to that of the pattern 32.

The work holder `66 is journaled in ahalf bearing 80 formed on-therfront endrof the headstock 36-and to this half bearing 80 are attached bearing straps' 81 completing the Y bearingforthe said work holder 66.v The half bearing V80 andthe strapsl 81'abut against annular flanges 82 and 83 formed exteriorly on the work'holder 66I tohold the o 4 lattermagainst longitudinal displacement.'

On the flange 83is'secure'd or'form'ed a gear wheel 90, and a similar gear wheel 91 is secured on the headstock spindle 33 yand the two gear wheels and 91 are connected by a gearing 92 with a. main shaft 93 provided with a pulley 94 connected by belt with other machinery for imparting a rotary motion s1- multaneously to the gear wheels 90 and91to rotate the samein unison and" consequently to rotate the propeller 21 vvandthepattern 32 in unison with each other. Y`

In order to impart the desired forward and backward motion to the carriage 11 .by

the feed screw 12, it is necessary to rotate the latter alternately in opposite directions and for this purpose the feed screw 12 iscon-` nected by a suitable changeable gearing witha main driving shaft 101 carryinglloose pulleys 102, 103 (see Figs. 1, 2 and 3) ,con-j nectedby belts with lsuitable machineryfor rotating the'- pulleys in opposite` directions;V

nately yrotated in opposite directions yand asimilar movement is given'to the feed screw 12 to vmove the carriage 11 forward and backward on the bed '10. The carriage 11 is provided with a sectional nut device of usual construction for connecting the carriage 11 with'the feed screw 12 'or for dis` connecting 'the carriage from thesaid feedl roe screw whenever it is desired to -stop lthe'` automatic feed ofthe carriage to allow of ruiming the carriage Aforward or backward i by hand.4 This hand'feeding device of the carriageell-'is of usual `construction sothat" further description yof the same is not deemed necessary. 1

When themachine is running the workL and the pattern 32 are rotated in unison and the pattern Vcontact 31 is incontact lwith the pattern 32 thus positioning the cutter head 14'Y correspondingly relativel to the Arough part,

of the work to fashion'the latter into a'blade 20 according to the pattern 32. When the blade 20 `has beenfinished thefmafc'hine is stopped andthe work is now reversed inthel work holder 66, aszpreviously explained, so

that the other portion of the rough work is subsequently'fashioned linto a blade 231011 repeating the above described operation.

In" order 1:0 reguiatethe depth ofthe ,cut

made. by the cutter head 14 on the work, it

is necessary lto adjust the pattern contact 31 nearer to vor farther from the cutter head' o 14,*'and for this purpose the-followingan rangement` is made, special reference beinghad to'Figs. 6 and 7i On the bracket 30 las tending rodl1122 journaled' in the frontend of the crosshead 13. The'front'fend of the rod 122 isprovided with a threaded portion 123 on which serewsianut'124 abutting against the hub of a wheel 11.25 connected by a key 126;"with the"rod 122, the keyengaging ya y keyway in the said rod to allow the wheel 125 to slide lengthwise on the rod 122 and to turn the same on turning the wheel 125. A sleeve 127 is loosely held on the rod 122 between the front end of the crosshead 13 and the rear end of the wheel 125. collar 128 is secured on the rod 122 and abuts against the rear face of the front of the crosshead 13. On the operator turning the wheel 125 in one direction, the rod 122 is similarly turned, and its threaded end 121 screwing in the nut 12() moves the crosshead 13 rearwardly and with it the cutter head 14, and when the wheel 125 is turned in the opposite direction then the crosshead 13 is moved forwardly and with it the cutter head 14. After the desired adjustment is made, the nut 124 is screwed up to securely clamp the wheel 125 in position against the sleeve 127 thus locking the rod 122 against accidental turning. j

In order to indicate the adjustment made, a gage rod 130 is attached to the slide 30 and its forward end longitudinally engages a bearing 131 attached to the forward portion of the crosshead 13. This end of the gage rod 130 is provided with a scale 132 which indicates on the bearing 131 so that the operator can readily determine the amount of adjustment given to the crosshead 13 and the cutter head 14 to regulate the depth of the cut of the cutter head 14 relative to the work. It is understood that by moving the crosshead 13 and with it the cutter head 14 forwardly as described, a deeper cut is made, and on adjusting the crosshead 13 and the cutter head 14 in a rearward direction a Vcut of lesser depth is made.

After the work has been turned to the desired shape according to the pattern 32 the crosshead 13 is -moved rearwardly to ,disengage the cutter head 14 from the work and thus to allow convenient removal of the same and reversing thereof. as previously explained, to fashion both blades 20 and 23 according to the pattern 32. In order to impart this rearward movement to the crosshead 13 use is made of a link 140 pivotally connecting the crosshead 13 with a bell crank lever 141 fulcrumed on the carriage 11 and under the control of the operator standing in front of the machine. Then the lever 141 is swung from the left to the right the link 140 pushes thel crosshead 13 rearwardly against the tension of its spring A stop 40. The lever`141fwhen in its extreme righthand Vposition with the short arm of the lever 141 abutting 'against'a stop'fpin 142 attachedtofc'arriage 11 is pasta central positionjthus holding the crosshead `13 locked iii rearn'iost positionv until' the lever 141 is again returned to its left hand position' after the work has again been placed in position 'on the workl'liolder 66 and -the' tailstock center 50, as previously explained.

From the foregoing it will be seen that by the arrangement described, the blades of aeroplane propellers and similar articles can be readily and accurately fashioned from a single piece of wood and in proper relation to the center of the propeller as the bore of the hub of the propeller is engaged by the attaching pin 60 thus locating both ends of the stick of wood in correct relation to the pattern.

It will also be noticed that by making the work holder G6 tubular and out of the path of its driving gear or the carriage driving gear, the end of the stick inactive at the time can readily project through the work holder without the slightest interference by any of the parts of the machine.

It will further be noticed that by the arrangement described, the work can be readily placed in position on the work holder and the tailstock center 50 and reversed to insure formation of a large number of propellers in a comparatively short time.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. In a copying lathe, a revoluble tubular work holder provided at one end with oppositely disposed brackets adapted to receive the hub of the work between them, and a pin provided with an integral head at one end and al nut screwing on the other end, the head being mounted to turn in one bracket and the nutbeing held against turning in the other bracket, the head and nut being adapted to engage the faces of the hub of the work to clamp the latter in place in the tubular work holder at a point beyond one end thereof.

2. In a copying lathe, a tubular work holder provided at one end with oppositely disposed adjustable brackets provided with parallel members projecting beyond one end of the holder, a pin adapted to extend through the hub of the work and provided at one end with a head engaging one of the said bracket members, the head having a flange seated on the said bracket member, a nut in which screws the outer end of the said Din, the nut being held in the other bracket member and having a flange seated on this bracket member, the said head and the said nut clampingly engaging the hub ble Work holder, diametrically l kopposite inV one of the said members, and nut held brackets held radially adjustable on one end in the other member and in Whiohsorews of the said Work holder and provided with the threaded end of the said'pin, rthe said 10 parallel longitudinally extending members, head and the said nut beingadaptedl to 5 a` pin adapted to extend centrally through clamp the Work between them. Y a bore in the middle of the Work, the pin GEORGE vA. ENSIGN.V 'K lhaving at one end a head mounted to turn v RUSSELL E. KLINGER..

ACopies of this patent may be lobtained for five cents each, by ladlrressing the Commissioner of .2a/tents,

Washington, D. C. i 

